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Crystal structure variations in the series SrLnCuS3 (Ln = La, Pr, Sm, Gd, Er and Lu).

Anna V RuseikinaLeonid A SolovyovMaksim V GrigorievOleg V Andreev
Published in: Acta crystallographica. Section C, Structural chemistry (2019)
The crystal structures of the complex sulfides SrLnCuS3 (Ln = Sm, Gd, Er and Lu) have been determined and refined using powder X-ray diffraction. The crystals are found to be orthorhombic, with the structure type changing consecutively in the order BaLaCuS3 → Eu2CuS3 → KZrCuS3 as the Ln3+ ionic radius decreases in the order La/Pr → Sm/Gd → Er/Lu. Variations of the structure parameters along the series of compounds studied are analyzed, and an effect caused by crystallochemical contraction on the stabilization of the respective structure types is demonstrated.
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